打开并读取usb的文件目录代码,C#代码库,德仔网

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【C#】打开并读取usb的文件目录
作者:魂祭心 / 发布于2016/1/11/ 632
学习的一个小例子，分享给大家。界面上拖一个 button 和treeview ，运行的时候直接插入优盘，单机按钮就会出现目录文件。。不过只能在u盘插入，U盘拔出时，才能接收到信息。
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace usbText
{
    public partial class Form1 : Form
    {
        DriveInfo Tdriver = null;
        public Form1()
        {
            InitializeComponent();
        }
        protected override void WndProc(ref Message m)
        {
  
            if (m.Msg == 0x0219)//WM_DEVICECHANGE
            {
                switch (m.WParam.ToInt32())
                {
                    case 0x8000://DBT_DEVICEARRIVAL
                        {
                            MessageBox.Show("设备插入");
                          
                                string[] dirs = Environment.GetLogicalDrives(); //取得所有的盘符  
                                foreach (string dir in dirs)
                                {
                                    Tdriver = new DriveInfo(dir);
                                    if (Tdriver.DriveType == DriveType.Removable)
                                    {
                                        {
                                            while (Tdriver.IsReady == false)
                                            {
                                                Thread.Sleep(500);
                                            }
                                            try
                                            {
                                                string PSTR = "";
                                                PSTR += "磁盘名称：" + Tdriver.Name + "\r\n";
                                                PSTR += "磁盘卷标：" + Tdriver.VolumeLabel + "\r\n";
                                                PSTR += "文件系统：" + Tdriver.DriveFormat + "\r\n";
                                                PSTR += "剩余大小：" + Tdriver.AvailableFreeSpace.ToString() + "\r\n";
                                                PSTR += "总体容量：" + Tdriver.TotalSize.ToString() + "\r\n";
                                                PSTR += "总体容量：" + Tdriver.RootDirectory.ToString() + "\r\n";
                                                MessageBox.Show(PSTR);
                                            }
                                            catch
                                            {
                                                MessageBox.Show("error");
                                            }
 
                                        }
                                    }
                            }  
                            break;
                        }
                    case 0x8004://DBT_DEVICEREMOVECOMPLETE
                        {
                            MessageBox.Show("设备拔出");
                            break;
                        }
                }
            }
            base.WndProc(ref m);
        }
        private void AddToTreeView(TreeNode node)
        {
            treeView1.Nodes.Add(node);
            treeView1.Refresh();
        }
        internal void LoadFolderFileList(string path, TreeNode nodes)
        {
            string[] dirs = Directory.GetDirectories(path);
            string[] files = Directory.GetFiles(path);
            for (int i = 0; i < dirs.Length; i++)
            {
                string[] info = new string[4];
                DirectoryInfo di = new DirectoryInfo(dirs[i]);
                TreeNode node = new TreeNode(di.Name);
                node.Tag = di.FullName;
                try
                {
                    if (di.GetDirectories().Length > 0 || di.GetFiles().Length > 0)
                    {
                        LoadFolderFileList(di.FullName, node);
                    }
                    else
                    {
                        continue;
                    }
                }
                catch
                {
                    continue;
                }
                nodes.Nodes.Add(node);
            }
            for (int i = 0; i < files.Length; i++)
            {
 
                FileInfo fi = new FileInfo(files[i]);
                TreeNode node = new TreeNode(fi.Name);
                node.Tag = fi.FullName;
                nodes.Nodes.Add(node);
 
            }
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            if (Tdriver != null)
            {
                TreeNode node = new TreeNode();
                LoadFolderFileList(Tdriver.RootDirectory.ToString(), node);
                treeView1.Nodes.Add(node);
            }
        }
    }
}
试试其它关键字
　usb　
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